Carrier 30G fault code 61

[hbquah]

Hi guys,

I am having a problem with my Carrier 30G air cooled
chiller, it displayed fault code 61.

Can anyone advice me on this problem? Boon.

[martinw58]

low discharge supper heat curcuit b
supr heat <2.8k for 10 mins

[gregd1401]

What is the second letter in the model number? eg 30gb, 30gt, 30gn.